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ABSTRACT: Current available soil information allows building baselines to improve research, such as sustainable resource management; however, its use requires analysis of accuracy and precision that describes specific variables on local and global scales. Therefore, this study evaluated differences in the spatial distribution of water retention capacity (WRC) of the soil at a depth of 0.3 m, calculated from local general soil surveys and the global gridded soil information system (SoilGrids), using detailed or semi-detailed soil surveys as a reference, in two regions of Colombia (A and B). The qualitative and statistical analyses evaluated differences in WRC surfaces generated by the information sources. Neither information sources described WRC accurately, achieving correlations between −0.15 and 0.49 and average absolute errors between 9.65 and 19.52 mm for zones A and B, respectively. However, studies on the local scale remain within the ranges observed in the most detailed local studies. The use of products on the global scale is subject to regional analyses; nevertheless, they can be included as a covariate in digital soil mapping studies on more detailed scales.

The anon or sugar apple is a species of the Annona genus, widely distributed in the world and in Colombia and a fruit with great potential in domestic and international markets. However, the technical information related to the aspects of propagation and production is limited. In the present study, the morphological and anatomical changes during seed germination of the sugar apple were determined using histological techniques and photographic records. The results show that seed germination is a process that takes place in two stages: testa rupture and endosperm rupture-radicle protrusion. In the post-germination stages, the induction and formation of lateral roots that were endogenously produced from the primary root from the pericycle were seen. The endosperm underwent morphological changes that increased its volume during imbibition and degraded in the final stages of germination, which could be indicative of endosperm weakening and reduction of mechanical strength imposed by embryo growth, which was required to complete germination in A. squamosa

The aim of this study was to evaluate changes in the germination potential, protein contents and soluble carbohydrates in sugar apple (Annona squamosa L.) seeds from Castilla-Tolima and Apulo-Cundinamarca, Colombia during storage for 30, 60 and 120 days in a cool room, refrigeration, and ambient conditions. In each period, the seed moisture contents, germination percentage (GP), mean germination time (MGT), mean germination rate (MGR), soluble protein content, and contents of sucrose, glucose and fructose were evaluated. The highest GP (> 80%) and MGR (0.15 germinated seeds / day) and the lowest MGT (

Se utilizó el modelo regionalizado de lluvia Regionalisierte Niederschlage (Regnie) para interpolar la lluvia y temperatura media del aire de las regiones Andina, Caribe y Pacífica de Colombia. Este modelo integró los datos de la pendiente y exposición del terreno obtenidos del modelo digital de elevación, así como los promedios climatológicos de 1440 series de precipitación y 258 series de temperatura registradas en igual número de estaciones meteorológicas de superficie para cada variable. Se establecieron los modelos de regresión lineal múltiple de la precipitación media anual y temperatura media anual del aire, además se utilizaron herramientas de geoprocesamiento para la generación de las superficies interpoladas. Los estadísticos de prueba de las superficies Regnie fueron similares a los obtenidos con interpolaciones con los métodos Spline e IDW para precipitación (coeficiente de determinación 0.81 y error medio de 55.6 mm) y mejores para la temperatura media (coeficiente de determinación 0.99 y error medio de 0.02°C).